A good visualisation are bullets on a battlefield, they are a lot, they travel from all directions but is really rare that a bullet encounters another.
A satellite is much smaller in relation to it’s orbit than a bullet is small in relation to the field.
In addition satellite orbit are tracked and adjusted to not interfere with each other.
Plus you have to consider that satellites are not just randomly spinning around the earth but (usually) following the “same” track.
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